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#rockbox log for 2017-01-25

amazoniantoad, https://imgur.com/a/IiUc2 here is the basic idea first set your meter to ohms and plug in the cord you will then check each part of the plug (R, L, G) and if the meter reads < 1.00 (NOT -1) then make note of which pin that was on your IPOD flex cable

amazoniantoad: try all of them, one that is connected will show very similar to when you touched the two meter probes together the others will show very high or what the meter displayes when you aren't connected to anything

now once you have that ready get your soldering iron, wet paper towel (or a small piece of kitchen sponge), your flux, rubbing alcohol, and the other end of the headphone cord, you are gong to plug the waste end of the headphone cord into the ipod to act as a heat sink

next we will set up the wire for tinning, so get the bare wires and one at a time dip them into the flux, next touch them to the tip of the soldering iron at the same time holding the solder on the wire just above the iron, take care not to coat the whole wire to the point that the solder flows under the remaining sheath as this will make them prone to breaking, and repeat

Btw if it is hot melt glue with your iron cool wrap some aluminum foil on the tip and use it to heat the stuff up and wipe it off I use my fingers but you'll probably want to use paper towel as it will burn the shit out of you

mine's an GE unit from the '80s or so... the iron design sucks (and doesn't suck), with solder solidifying in its internal passages... so I get about twenty joints, then I have to hit it with a propane torch while under vacuum to get the solder actually out of it.

I think most of the problem is the vacuum system design. when you press the trigger, it starts the vacuum pump, causing a slow buildup of vacuum, which moves the solder slowly and lets it solidify in the iron. I keep meaning to re-engineer it so the pump maintains vacuum in a reservoir, and the trigger opens a solenoid valve. hopefully then the sudden full vacuum will move the solder fast enough it doesn't cool in the iron.

of course, this design adds a reservoir, a solenoid valve to switch vacuum to the iron, and either a continuous duty pump, or a vacuum switch to cycle the pump, plus a higher-quality pump that starts under vacuum (the one in it does not) or an unloader valve...

pamaury: Thanks. Note I have not yet tested on internal power. When I did that on previous recent builds, failure rate was much higher, esp.on near-empty battery. Let's see your voltage-tweak build on external results before going to internal.

the percent basically tells you how much faster it is compared to real time. 100% means you can decode in in real time but barely. 50% means you cpu is way too slow. 200% means you cpu is working only half of the time

Amazoniantoad i seriously doubt it is the solder beginners always have problems with low powered irons. But if you want to try get rosin core 60/40 or 63/47 electronics solder in the smallest size possible

pamaury, Do you want details of Data Aborts from the voltage fix ZEN build, on the unit (N) here that suffered coloured dots on lcd_fix (45697a0bf-161212) but on recent builds fails with a DA upon start-up?

One ZEN unit (N) here ram RB lcd_fix (45697a0bf-161212) but suffered colours dots on screen. An a few subsequent builds it failed with a data abort upon each start-up. On the current voltage fix build it fails with a data abort upon each start-up.

Yes, of five units tested, only this one, unit N, failed. And the fail is not like previous fails possibly attributed to the voltage issue. Is it not a BSoPO in play. It is a data abort on most start-ups.

We already know this unit runs RB with a different degree of success w.r.t. other units. Yet runs the OF equally well as other units. Perhaps the fact it's the only one purchased in the US is significant.

Interesting about Unit N's crash upon launching battery_bench is that the BSoPO is immediately preceded by 200ms of shifting white jagged diagonal lines on black background, and I've seen no such behaviour from RB before.